I have been using K&N air filters since the 1970s. I am now in my 50s. Over the years I have had them in all my road bikes and cars. But it's only been in the last few years that I have been using the oil filters and now I will never use anything else. They're easy to take off with the nut on the filter and that's a big big plus. The filter works so so good too. Thank you K&N, your products work.